The invention discloses a preparation method of a
microwave-assisted magnetic hollow Zn / Co
zeolite imidazole nanocage material. The preparation method comprises the steps: adopting Nano Fe3O4 as a
seed crystal, adding
cobalt nitrate hexahydrate and 2-methylimidazole and
zinc nitrate hexahydrate successively, performing rapid self-
assembly based on
seed crystal induction so as to form a double-shell Zn / Co-ZIF
crystal and form a magnetic double-shell nano
crystal Fe3O4@ZIF-67@ZIF-8, utilizing
methanol to absorb the
microwave energy under the assistance action of microwaves, and transferring energy quickly to an inner shell ZIF-67 with poor
chemical stability so as to bring vibration and
cracking of
metal organic skeleton ZIF-67 bonds, achieve
etching of the inner shell and obtain Fe3O4@Zn / Co-ZIF. The material has a hollow cage-shaped morphology, a large specific surface area, a complete
crystal form, multiple pores, high
chemical stability and good magnetic properties for convenient
magnetic separation. The material has an efficient and high-
throughput adsorption for antibiotic
quinolone drugs, has another
advantage of easy separation from the antibiotic
quinolone drugs, can be regenerated and reused at least 8 times, has excellent reproducibility, and has easy realization of high-efficiency removal of high-residue
quinolone antibiotics in a large-scale
water environment.